| 摘要 |
A vacuum food storage system comprises a vacuum container having an air valve, and a cordless vacuum unit capable of being supported on top of the container for extracting air through the air valve. To provide a more substantive visual indication of the presence of vacuum a resilient seal between the vacuum unit and the container resiliently suspends the vacuum unit so that, as the vacuum increases, the entire vacuum unit is drawn down onto the container. A hands-free operation and more evocative audible indication of the presence of vacuum is provided by employing a pressure-equalising valve that abruptly opens to provide a channel between the interface chamber and ambient air when a vacuum sensor indicates a predefined vacuum level within the container. |
