Importance

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Abstract

Embodiments of the present invention provide techniques for ventilating an enclosure such as the cargo space of a vehicle. In an example implementation, a ventilator is affixed to an external wall (e.g., the roof) of the cargo space. The ventilator includes a ram inlet that flows into a venturi, along one or more openings in a boundary of the cargo space, and exits at an outlet. When the vehicle is in motion, external airflow enters the ram inlet, gets compressed in the venturi, and travels over the top of the boundary, generating a high shear that pulls airflow from the cargo space, into the diffuser, and out the outlet. The ventilator may include an electric fan that generates suction from the cargo space when the vehicle is stationary, and a moveable flap at the inlet that directs the suction towards the cargo space when the vehicle is stationary.

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First Claim