Webasto Ag Fahrzeugtechnik

Guenter Kahnau

Friedrich Widemann

Stefan Kunz

Dieter Raethel

Bernhard Schmatelka

Peter Glaser

Peter Koch

Georg Habbel

Richard Kohse

A heating device (1) is provided with a sleeve member (14) surrounding a burner element (10) of the heating device, such that a combustion air chamber (15), having a predetermined volume coordinated to the respective configuration of the burner, is obtained between the burner element (10) and the sleeve member (14). The sleeve member (14) may be radially divided into two parts (14a, 14b), which parts are tightened against each other for sealing purposes. At a front end, the combustion air chamber (15) is defined by a cover (16) having an inlet opening (17) for the combustion air, which inlet opening is sealed relative to the environment and is connected with the outlet of a combustion air blower. The sleeve member (14) may be made of a light metal, such as aluminum or an aluminum alloy.

Heating device, particularly vehicle heating device

A water type heater, in particular a vehicle auxiliary heater having a temperature safety mechanism, intended to prevent overheating damage to temperature-sensitive parts of the heater, that utilizes a contact sensor that is in heat conducting connection with the heat exchanger. As a heat conducting connection, a direct physical contact between the heat exchanger and a water jacket casing of the heater can be utilized that is, preferably, achieved with the aid of a projection, and optionally, a diametrically opposite projection acting as countersupport. In a modified embodiment, an elastic body that conducts heat well can be placed in a compressed state between the jacket casing and the heat exchanger. The contact sensor then lies against the outer surface of the casing as the temperature safety mechanism. The elastic body that conducts heat well is suitably made in the form of a disk made of a graphite material. In other embodiments, the contact sensor can be spring-mounted or at least a head part thereof can be elastically deformable. In this way, the contact sensor can extend into direct engagement with the heat exchanger without being adversely affected by thermal expansion effects experienced by the heat exchanger and jacket casing during operation of the heater.

Heater, in particular vehicle auxiliary heater, with a temperature

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Soecking, Germany

Guenter Kahnau