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US 4,726,514 AGranted
Heating device
AssigneeWebasto-Werk W. Baier GmbH & Co.
InventorWillibald Adam
Life of this patent
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AssigneeWebasto-Werk W. Baier GmbH & Co.
InventorWillibald Adam
Estimating the term…
A heating device, particularly an auxiliary vehicle heating device, in which there are disposed, a first temperature sensor at the inlet, and a second temperature sensor at the outlet of the heating device. The outputs of the two temperature sensors are connected with a circuit, so that the operating condition of the heat exchanger of the heating device can be constantly monitored. For the purpose of early detection of a tendency towards overheating of the heating device, appropriately, the temperature differential between the two temperature sensors is determined, and, based upon a predetermined threshold value, the heating device is turned off, if necessary, in order to prevent resultant damage. The outputs of the temperature sensors can also be integrated with a control unit for the performance of control functions and, based upon different switch points, control operation of the vehicle blower, the heating output, and/or the heat exchanger temperature.
Heating device, particularly an auxiliary vehicle heating device, comprising an inlet, a heat exchanger through which a heat exchanger medium is passed and a control unit for controlling the operation of the heating device, wherein a first temperature sensor is disposed in proximity to an inlet of the heat exchanger for the heat exchange medium and a second temperature sensor is disposed in proximity to an outlet of the heat exchanger for the heat exchange medium, and wherein outputs of said temperature sensors are linked with a circuit means of said control unit for constantly monitoring the operating condition of the heat exchanger and for detecting the occurrence of operating conditions which may lead to overheating of the heating device, said control unit being responsive to detection of a potential overheating causing condition by said circuit means for changing the operation of the heating device in a manner acting to prevent the actual occurrence of an overheating condition.
Dependencies are inferred from the claim text.