Abstract: The heat exchanger (100) encompasses an vertical housing (1), in which a bundle (50) of parallel pipes (30) is provided, which pipes extend between a lower pipe header (10) and an upper pipe header (20) and can be flowed through by a hot process gas that enters at the intake (4) and exits at the outlet (9). At the outer circumference of the pipes (30), the heat of the process gas is transferred to a fluid cooling medium, for example air, that enters the housing (1) at the intake (17) and exits it at the outlet (24). The highest pipe (30) temperatures occur in the region of the lower pipe header, which, for this reason, is configured as a double pipe header (10) that is cooled by boiling water (FIG. 1).

Abstract: A vaporization burner for a heater operated with liquid fuel, in particular an auxiliary vehicle heater with a support that projects into a combustion chamber and on whose front side facing the combustion chamber an absorbent body is located that is supplied with fuel by a fuel feed pipe and on whose back side there is connected an ignition chamber that contains an igniter, for which a passage to the combustion chamber is provided in the support. To achieve improved combustion performance, especially in the start-up phase, with even fuel and heat distribution over the absorbent body, according to a preferred embodiment, a perforated disk is placed between the support and the absorbent body that has a through-hole in the area of a passage in the support and also has a slot-shaped notch which runs from the through-hole up the the edge of perforated disk.

Abstract: A tangential blower stands out for its low noise level as a result of a specially constructed baffle plate inlet edge, vortex former and pressure connection. It is also possible to vary air-inlet and air-outlet cross sections and thus influence the blower characteristic.