Importance

Loading Importance Indicators...

Abstract

To provide an expansion valve having a low-pressure passage that is bent at right angles therein, which is reduced in untoward noise and noise of the flow of refrigerant generated when the refrigerant passes through the low-pressure passage. In an intersecting portion of a low-pressure passage, the axis of a port for introducing refrigerant returned from an evaporator, and the axis of a port for guiding out refrigerant having passed through a body block to a compressor are orthogonal to each other. A hole is formed in the body block in a direction of insertion of a shaft that transmits a driving force from a power element to a valve element, and a holder for holding the shaft. When holes coaxial with the ports, respectively, are formed by drills having the same diameter as that of the hole, the holes are formed in a manner such that the tip of one drill does not extend beyond the hole formed by the other drill, to make inner walls on an outer peripheral side along which refrigerant flows at an increased speed, smoothly continuous, without forming any recess or edge portion having a boundary portion with an angle equal to or smaller than a right angle.

Loading the Abstract Image...

First Claim