Abstract: A fan shroud is provided for a cooling fan that is partially offset relative to a core portion of a vehicle mounted heat converter. The fan shroud has an arcuate portion that is offset from the core portion. The fan shroud also has an arcuate portion and a connection portion that are not offset from the core portion. The fan shroud has an overlap ratio defined as a ratio of the portion of the fan blades covered by the fan shroud in the cooling fan to the axial depth (front end to rear end) of blades. The overlap ratio at the arcuate portion is set smaller than the overlap ratio at the arcuate portion and the connection portion.

Abstract: A fan shroud is provided for a cooling fan that is partially offset relative to a core portion of a vehicle mounted heat converter. The fan shroud has an arcuate portion that is offset from the core portion. The fan shroud also has an arcuate portion and a connection portion that are not offset from the core portion. The fan shroud has an overlap ratio defined as a ratio of the portion of the fan blades covered by the fan shroud in the cooling fan to the axial depth (front end to rear end) of blades. The overlap ratio at the arcuate portion is set smaller than the overlap ratio at the arcuate portion and the connection portion.

Abstract: A heat exchanger according to the present invention has tube capable of flowing a fluid through interiors of the tube, a partition member provided in the tube to extend in the flowing direction of the fluid flows, a flow-through space determined by using the partition member in the tube, the fluid flowing through the interior of the flow-through space, and a non-flow-through space determined by using the partition member in the tube, the fluid being unable to flow through the interior of the non-flow-through space. Heat is exchanged between the fluid and the exterior of the tube. A portion of the tube corresponding to the non-flow-through space is mainly applied with an external action.