| 摘要 |
<p>The invention relates to a heating apparatus (1) including a condensation heat exchanger (2), a gas burner (3), a sleeve (40) for conveying an air/gas mixture to the burner (3), a means (42) for circulating said mixture in the apparatus, and a pipe (430) for feeding said gas into the intake sleeve (40). The heat exchanger (2) includes a tube (21) mounted inside an enclosure (200) defined by a housing (20), wherein a fluid to be heated flows through the tube (21) and the tube is exposed to hot gases generated by said burner (3), said housing (20) including a sleeve (205) for discharging the burnt gases. The invention is characterized in that at least one Venturi tube (70) is provided in said supply sleeve (40) downstream from the gas-feeding pipe (430), and the partial-vacuum chamber (76) of the Venturi tube (70) is in fluid communication with the collar (71) of the Venturi tube, said collar having a hole (710) extending therethrough, and in that at least one tubular junction part (8) connects the inside of the enclosure (200) with the partial-vacuum chamber (76) in order to collect a portion of the burnt gases and mix the latter with the air/gas mixture fed into the burner.</p> |
