| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve reliability in switching operation in a flow channel switch valve keeping a seating state of a main valve by pressure difference between a conducting passage of the main valve and a pressure control space. <P>SOLUTION: An S port 2a is formed on a valve seat 2, and a C switch port 2b and an E switch port 2c are formed on a state of being separated approximately at 90°. A D port 1a is formed on a position opposite to the S port 2a, of a side face of a valve chest 11 of a case portion 1. A switch plate 5 is rotatably mounted in a fan-shaped space S at an outer side of the conducting portion 31 of the main valve 31. A pressure in the conducting portion 31 is equalized by an auxiliary valve and a pressure equalizing hole, a high-pressure refrigerant from the D port 1a is applied to the conducting portion 31 through the switch plate 5, and the main valve 3 is rotated by jetting power of the refrigerant, and pressure difference between a first chamber S1 and a second chamber S2. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
