| 摘要 |
An improved irrigation evacuation system and method, to use in conjunction with an existing automatic irrigation system for controlling the sequence and duration of purging water from each irrigation zone. The system comprises an air source of adequate volume and pressure having an air outlet, a purge controller, a plurality of existing solenoid valves having corresponding irrigation zones, the air source being of adequate volume and pressure to evacuate the water from at least one irrigation zone, the air outlet being in fluid communication with the existing solenoid valves, the purge controller being in signal communication with the existing solenoid valves whereby upon purge initiation, the purge controller opens one existing solenoid valve thereby putting the corresponding irrigation zone in flow communication with the air source until purged, the purge controller then closing the solenoid valve, sequencing to the next solenoid valve, and repeating until all irrigation zones are purged. Embodiments include a temperature sensor in signal communication with the purge controller thereby allowing for purge initiation upon the temperature reaching a set point. Further embodiments include a pressure sensor in signal communication with the purge controller thereby providing for the purge controller to sense when purging of an irrigation zone is complete allowing for the sequencing to the next irrigation zone. The purge time for each irrigation zone may be set by the user, come preset as programmed within the purge controller, or be set during the first purge.
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