| 摘要 |
The invention is comprised of a venturi tube with a very narrow throat, a compressor fan at the intake end of said venturi tube, a blower fan at the output end, a plurality of turbinate fins on the interior of the intake end, and a means of heat dissipation on the exterior of the intake end of said venturi tube. Instead of a circular cross-section profile, the venturi tube has a cross-section of a polygon with no parallel sides, so that considerably less aerodynamic noise is generated than if the venturi tube's cross-section was circular. In addition, this cross-section results in variances in flow velocity along the cross-section, assuring continuous flow through the unit should a sonic choke occur at any point in the unit. The fans may be of any type and driven by any means appropriate to the respective model of the invention's application, i.e. by internally or externally mounted motor(s), power takeoff, belt drive from an external source of torque, etc. Gases are compressed into the intake end of the venturi tube by the compressor fan; the compressed gases rise in temperature. The turbinate fins located in the interior of the intake section of the venturi tube serve two purposes: one, as cooling fins to cool the compressed gases; and two, as a ducting means to promote the turbulent transfer of heat out of said intake end of the venturi tube, increasing thermal transfer efficiency. Said heat is conducted through the turbinate fins, out through the sides of the intake end of the venturi tube, and is dissipated outside of the tube by any means appropriate to the respective model of the invention's application, i.e. heat sink, cooling fins, water jacket, or any combination thereof. The blower fan on the output end of said venturi tube creates a partial vacuum inside the output end of the tube, drawing gases through the narrow mid-section and out of the output end of said tube. This causes the gases to lose pressure and therefore temperature. The resultant temperature of the discharged gases is lower than the temperature of the ambient or intake gases.
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