| 摘要 |
<p>A relief valve comprises a valve seat (1) formed with a cavity (11) therein, a water outlet passage (8) and a pressure relief passage (3) being provided on the bottom of the valve seat (1), the centre of a bottom surface of the cavity (11) being provided with an upward protrusion (12); a valve body (2) fixed inside the cavity (11); a water inlet passage (5) is provided on the top of the valve body (2), the bottom of the valve body (2) is formed with a recess (21), a plurality of apertures (22) is provided in the inner peripheral wall of the recess (21) each communicating with the outer peripheral surface of the valve body (2), a downward protrusion (23) is provided at the centre of the recess (21); a sealing plate (6), made of flexible material, is disposed inside the cavity (11) and positioned under the valve body (2), a gap (X) is formed between the peripheral surface of the sealing plate (6) and the inner peripheral wall of the cavity (11), a plurality of elastic portions (61) protruding downward is provided on the bottom surface of the sealing plate (6), the bottom of each elastic portion (61) being supported on the bottom surface of the cavity (11). This valve configuration not only may realize the pressure-relief and split-flow functionality of the solenoid valves, but also has a cost far below that of the solenoid valves; in addition, the function of blocking or unblocking the inlet of the pressure relief passage is achieved through the deformability of the sealing plate, so no spring is needed, thus keeping the beverage free of contamination by rusty springs.</p> |
