Devivac vacuum degassing device can conveniently and reliably remove air from heating or cooling systems. A professionally designed vacuum jet exhaust device can almost completely exhaust the gas inside the pipeline. Whether it is a small water system or a large long pipeline system, continuous or intermittent exhaust methods can be set through different programs. Different exhaust methods will be optimized and adjusted based on actual conditions such as start-up, working conditions, and monitoring signals. This method can quickly and reliably eliminate gases during system debugging or maintenance without requiring much effort.