| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent leakage of a refrigerant at a connection part with an external piping even when a body block is made of synthetic resin. SOLUTION: In a piping connection structure of an expansion valve wherein a valve disk 31 for controlling the flow rate of a high pressure refrigerant flowing into an evaporator is arranged in the course of refrigerant passageways 12 and 13 formed on a body block 11 made of a synthetic resin and external pipings 2, 3, 6 and 7 through which the refrigerant passes are inserted to be connected to the end parts of the refrigerant passageways 12 and 13, circular seal members 4, 5, 8 and 9 comprising an elastic material are radially squeezed and mounted on connection parts of the refrigerant passageways 12 and 13 and the external pippins 2, 3, 6 and 7.</p> |
