| 摘要 |
An electric vehicle has a traction motor and apparatus comprising an air circuit for cooling the traction motor, for providing heat, where required, for the cabin of the vehicle, and for ventilating the cabin. The air circuit of the apparatus comprises a main branch containing a main ventilating and heating blower, together with a secondary branch which is branched from the first branch and which contains the cooling radiator for the traction motor. An auxiliary blower is arranged in the secondary branch. An upstream mixing valve and a downstream mixing valve connect these two branches in parallel, in such a way that either: the flow of cabin heating air passes through the radiator; or the mixing valves isolate the secondary branch, so as to form an entirely separate cooling air circuit in which the air flow is produced by the auxiliary blower.
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