| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an abnormal pressure countermeasure capable of decompressing even without releasing liquid to outside a liquid passage. <P>SOLUTION: A check valve system 30 is equipped as well with a function to check a counterflow with a normal liquid pressure (check valve 35) as with a function to decompress a counterflow having an abnormally high pressure (regulating valve). The check valve 35 hinders the liquid from flowing from a water delivery chamber 32 to a water suction chamber 31 when the liquid pressure in the water delivery chamber 32 is higher than that in the water suction chamber 31 with the pressure difference being equal to or below the prescribed value. The regulating valve admits flowing of the liquid from the water delivery chamber 32 to the water suction chamber 31 when the pressure difference is equal to or above the prescribed value. Accordingly, if an abnormal pressure is generated originating from a steep rise of the liquid pressure in the water delivery chamber 32 and the pressure difference from the water suction chamber 31 has become equal to or above the prescribed value, the liquid pressure in the water delivery chamber 32 can be decompressed by releasing the liquid from the water delivery chamber 32 to the water suction chamber 31. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
