| 摘要 |
A fluid compressor or pump includes a driver such as a reciprocating piston or a voice-coil actuated diaphragm, which creates pressure waves in the fluid. The waves propagate through a tapered tube, in which the pressure increases as the waves move toward the small end. A valve at the small end of the tapered tube allows higher-pressure portions of the pulses of fluid to emerge. The pulses of pressurized fluid may be applied directly to a utilization apparatus, or they may be accumulated in a tank. The tapered tube may be more than one-tenth wavelength long, and preferably one-quarter wavelength long, to take advantage of the effects of reflections. A refrigeration unit including such a compressor dispenses with an accumulator, and provides heat-dissipating fins on the outer surface of the tapered tube.
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