| 摘要 |
<p>An automatic inflation and constant pressure device for an elastic container (1) comprises the elastic container (1) and a two-stage air pump that consists of a small air pump (2) and a large air pump (3) connected serially. The two-stage air pump is installed in the elastic container (1). The working cross-sectional area of the small air pump (2) is smaller than the working cross-sectional area of the large air pump (3). When in operation, the two pumps operate simultaneously or alternately, so that air with specified pressure is filled into the elastic container (1) till a constant pressure is achieved. The adjustment of pressure from opening one-way valves (4, 5, 6) can control the final air pressure.</p> |
