| 摘要 |
<p>A two-way draining valve for coffee making machines includes an L-shaped housing (1) containing a chamber (3), an inlet opening (7) for delivering water to the chamber (3) from a pump (18), an outlet opening (2) arranged in an upper leg of the housing (1) for delivering water from the chamber (3) to a boiler inlet (9), and a draining bore (5) arranged in a lower leg of the housing and communicating with the chamber (3). A spherical rubber valve ball (4) is arranged within the chamber (3) and is movable with respect to the draining bore (5) in response to changes in pressure in the chamber (3). The ball valve (4) opens and closes the draining bore (5) in accordance with the chamber pressure to enable excess steam and water from the boiler (9) and the pump (8) , and excess air from the pump (8) to exit the chamber (3) via the draining bore (5). Thus, pressure within the boiler (9) is controlled to prevent dripping of the coffee making machine. <IMAGE></p> |
