| 摘要 |
A hot-air heater, especially for vehicles, having a burner disposed in a housing, a fuel supply means for delivering fuel to the burner and a combustion-air fan for feeding combustion-air to said burner. Combustion-air, exhaust-gas and heating-air ducts are constructed within the housing. The housing has an opening for providing access to at least one space in which adjustable and/or replaceable parts are situated, the space being closable, relative to the outside of the heater, by means of a housing cover, and being connected to at least one of the combustion-air and exhaust-gas ducts. For reasons of safety, a combustion-air exhaust opening is provided on the pressure side of the combustion-air fan, which is blocked only when a housing cover for the housing access opening is in place, and being dimensioned in such a way that, when the combustion-air exhaust opening is not blocked, sufficient combustion-air is exhausted therethrough such that operation of the heater is not possible. |
