WATER FEED SYSTEM, TOILET BOWL, TOILET BOWL WASHING METHOD

摘要

Provided are a water feed system, which can feed a toilet bowl with washing water at a sufficient instantaneous flow rate even when a tank of a lower capacity than that of a low tank is used, or even in case the diameter of city water piping is small or in case the water feeding pressure is not sufficiently high, a toilet bowl equipped with the water feed system, and a method for washing the toilet bowl. At an initial washing stage, a water valve (2), an air valve (9) and an atmospheric valve (13) are opened. As a result, the water is fed at a flow rate (W<SUB>1</SUB>) from a water tank (8) to a toilet bowl (20). After this, the air valve (9) is closed. As a result, the water is fed from the water tank (8) to the toilet bowl (20) at a total flow rate (W<SUB>2</SUB> = W<SUB>1</SUB> + A<SUB>1</SUB>) of the newly fed flow rate (W<SUB>1</SUB>) and a flow rate (A<SUB>1</SUB>) of air to flow through the atmospheric valve (13). After this, a suction valve (16) is opened to suck the secondary side of a trap (24). As a result, an intense siphon is early formed in the trap (24). After this siphon start, the atmospheric valve (13) is opened, but the suction valve (16) is closed, to feed the water at the flow rate (W<SUB>2</SUB>) thereby to keep the siphon.