GAS FLOW SWITCHING DEVICE

摘要

To reverse gas flows between gas sources and gas sinks, a gas flow switching device comprises gas passages, which communicate with each other and have connecting points for the gas sources and sinks, as well as a device for setting different pressures. The aim of the invention is to simplify the construction of such a gas flow switching device while making it possible to obtain precisely defined pressure and flow conditions without the need for calibration. To this end two plates (9, 10), which are positioned on top of each other and joined together, on their sides facing each other have congruent channels (11) having a semicircular cross-section. Said channels embody the gas passages (4, 8) and, at their lateral exit points from the plates (9, 10), the connecting points (12 to 17).