ELECTRONIC SYSTEM FOR AUTOMATICALLY FILLING AND EMPTYING CISTERNS

The invention relates to an electronic system for automatically filling and emptying cisterns. The inventive system, which is particularly suitable for toilet cisterns, comprises an electrovalve (6) which is intended to be inserted in the cistern water feed pipe and which can be activated by means of a control circuit (18) that receives information from a hydrometric sensor (7) which is disposed at a suitable level inside the cistern (1). In this way, whenever empty, the cistern (1) is automatically filled. Moreover, the cistern can be half emptied or fully emptied using the control unit (18), together with a pair of push-buttons (21 and 22), by controlling the electromagnetic coil of an automatic emptying device (8) which drives the sealing piston of said device. As a result, the aforementioned push-buttons (21 and 22), which are disposed in an easily-accessible control panel, allow the user to establish the cistern emptying level as desired in order to optimise water use. Another unit (19) is used to reset the system by means of a push-button (16) and a safety unit (20) deactivates the electrovalve (6) when said valve has been open for longer than a pre-established time, either owing to a fault in the mechanisms of automatic emptying device (8) or the absence of water in the supply system. Sistema de descarga para cisternas de inodoros. A partir de una fuente de alimentación (1) para un circuito en el que participa un bloque de carga (4), un bloque de on/off (5) y un bloque de seguridad (6), para gobierno de la electroválvula de llenado de una cisterna (7), las mejoras consisten en dotar a dicha cisterna (7) de un descargador automático (13), preferentemente de tipo electromagnético, y convertir el bloque de carga (4) en un bloque de carga y descarga, en el que la descarga está controlada mediante dos pulsadores (11) y (12), uno de descarga completa y otro de media descarga, para un mejor aprovechamiento del agua suministrada por la cisterna (7).