| 摘要 |
A continuous-flow oxygen valve for oxygen rebreathers employs the use of reversible rotary motors to control continuously variable valves in order to provide more constant gas flow to oxygen rebreathers. The motor is connected by gears to a valve which can be adjusted over the appropriate control range necessary to maintain the optimum gas balance. Once the valve is adjusted, the amount of gas flowing through it remains constant until a subsequent adjustment is performed. The gas levels are measured by sensors and conditioning circuitry. Once the appropriate gas flow is computed by the unit control elements, the controller will cause continuous or pulsed current to flow through the valve motor until the flow is set at the appropriate level. Current will then cease to flow. When conditions cause the balance of the gasses to vary from the optimum level, the controller will again make an adjustment in the valve position.
|
