AUTOMOTIVE HEATER Russian patent published in 2014 - IPC B60H1/22 

FIELD: transport.

SUBSTANCE: invention relates to automotive seat system. Proposed heater comprises burner (12) with elongated fire tube (16) extending in lengthwise axis (L) to divert exhaust gases from combustion chamber (14) and heat exchanger casing (18) to cover said fire tube (16) around said axis (L) to confine space (26) for exhaust gas backflow (20) and bottom (30) arranged opposite end area (28) for exhaust of flue gases from fire tube (16). Discharge opening (38) to release offgas from said space (26) is arranged in heat exchanger casing (18), at its discharge area (48). Flow cross-section in first axial area (33) of gas backflow space (26), between fire tube (16) and circular wall (20) in circular discharge area (48) is smaller than that in circular area (50) with respect to lengthwise axis (L) located opposite circular discharge area (48). Flow cross-section in circular discharge area, downstream of the first axial expansion are increases. Flow cross-section in discharge circular area (48) in direction of offgas discharge outlet (38) of second axial area (52) downstream of expansion area (35) corresponds, in fact to flow cross-section in opposite circular area (50) and/or flow cross-section in expansion area (52) increases in stepwise manner.

EFFECT: better heat exchange.

11 cl, 3 dwg