System used to feed wc flushing tanks with recycled water

Abstract

The present invention relates to a system used to feed WC flushing tanks (C) with recycled water collected in a tank ( 1 ) in which the water coming from the sink (L), other sanitary fittings and household appliances (LB) is drained; it being provided that, in case of absence or draining of the recycled water reserve, the same system is capable of favouring the feeding of the flushing tanks (C) with “clear” water normally supplied by the domestic water network ( 8 ).

1 . System used to feed WC flushing tanks with recycled water, characterised in that it comprises the following parts:
 a recovery tank ( 1 ) of the water coming from the drain pipe ( 2 ) of a sink (L) and/or another sanitary fitting, which is internally provided with a pump ( 5 ) installed on the bottom wall and with a float-switch ( 6 ) used to detect the level of the water contained in it;   a pipe ( 7 ) provided with a feed check valve ( 7   a ) designed to provide the water connection between the tank ( 1 ) and the branch ( 8 ) of the domestic water network that feeds the flushing tank (C) usually provided with a water inlet valve ( 9   a ) controlled by a float ( 9 );   a flow sensor ( 11 ) installed in the section of the system comprised between the flushing tank (C) and the insertion point (P) of the pipe ( 7 ) in the branch ( 8 );   a normally open electrovalve ( 8   a ) installed along the said branch ( 8 ) of the domestic water network upstream the insertion point (P) of the branch ( 7 ) from the tank ( 1 );   an electronic control unit ( 10 ) interfaced with the pump ( 5 ) and the float-switch ( 6 ) installed in the recovery tank ( 1 ), with the flow sensor ( 11 ), and with the electrovalve ( 8   a ) inserted in the branch ( 8 ) of the domestic water network; it being also provided that the control unit ( 10 ) is programmed in such a way to operate alternatively as follows:   when the flow sensor ( 11 ) detects a water flow in the idle condition of the system of the invention and transmits the information about the emptying of the flushing tank (C) and when the float-switch ( 6 ) of the tank ( 1 ) transmits the information about the presence of sufficient quantity of recycled water, it closes the electrovalve ( 8   a ) and activates the pump ( 5 ), thus favouring the water flow into the pipe ( 7 ) and, then, into the branch ( 8 ) of the water network and in the flushing tank (C), until the flow sensor ( 11 ) signals the stop of the flow following to the closing of the valve ( 9   a ) of the flushing tank (C), usually operated by the float ( 9 ) after filling;   when, following to the emptying of the flushing tank (C) informed by the flow sensor ( 11 ), it has received the information from the float-switch ( 6 ) of the tank ( 1 ) about the absence of recycled water, it omits to activate the pump ( 5 ).   
     
     
         2 . System as claimed in  claim 1 , characterised in that the control unit ( 10 ) is additionally programmed to operate as follows:
 when during the operation of the pump ( 5 ) the float-switch ( 6 ) transmits the information about the draining of the recycled water inside the tank ( 1 ), it deactivates the pump ( 5 ) and opens the electrovalve ( 8   a ) inserted in the branch of the domestic water network ( 8 ).   
     
     
         3 . System as claimed in  claim 1 , characterised in that an additional supply pipe ( 3 ) is inserted into the recovery tank ( 1 ), which supplies the water drained from one or more household appliances (LB). 
     
     
         4 . System as claimed in  claim 1 , characterised in that the recovery tank ( 1 ) is provided on top with a traditional “overflow” valve that feeds a drain pipe ( 4 ) normally inserted into the sewage.