| 摘要 |
A device (1) intended for heating the coolant of a motor driven vehicle in order to heat the engine of the vehicle, which device comprises a connection arrangement (3) arranged to allow electrical connection of the device to a current source and a heat--generating element (5) comprising an electrical conductor (7) designed to generate heat when a current flows through the con-ductor, which heat-generating element (5) is designed to be in contact with and transfer the generated thermal energy to the coolant water, wherein the electrical conductor (7) is designed in such a way that the conductor is destroyed if the heat transfer from the heat-generating element substantially decreases during a time period, wherein the current through the conductor is inter-rupted. |
