SELF-REGULATING SYSTEM FOR WATERING PLANTS

摘要

A device for automatically watering household plants. A sealed reservoir (20) is used to supply the growing medium (12) in a pot (14) with water via a capillary mat (32). There is small water outlet aperture (24) in the base (22) in the reservoir (20). An air inlet tube (26) extends up through the base to near the top of the reservoir, which allows air into the reservoir. The bottom end of the tube (26) stands on the mat (32) so that an air inlet notch (28) periodically becomes sealed by water held in the mat (28), which stops the water flow through the water outlet (24). As the plant (10) takes water the mat dries out and eventually the seal at the air inlet will be broken, allowing water to flow from the reservoir once more.