Patent ID: 7188483

Claim:
An expansion valve comprising: a body having at least one or more flow channels, each of which has inlets and outlets whose central lines are at an approximate right angle to each other, and a guide part formed on an intersection between the inlet and the outlet for guiding the flow of working fluid; a head part mounted on the body and reciprocating a rod in an axial direction by expansion and contraction actions according to a temperature change of the working fluid discharged from an outlet of an evaporator and flowing through the flow channel; and opening means for controlling a flow amount of the working fluid flowing through the flow channel according to the movement of the rod, wherein the guide part includes inclined surfaces formed on the inlet and the outlet, respectively, and a length between start portions of the inclined surfaces of the inlet and the outlet and the center of a through hole of the body through which the rod goes satisfies the following formula: 0 ≦ L ≦ 45 mm.