| 摘要 |
<p>A valve body 30 of an expansion valve 10' is equipped with a first passage 32' formed by a cutting process through which a high-pressure refrigerant travels, and on the lower portion of the valve body 30 is formed a space 35a defining a valve chamber 35' from the bottom portion of the valve body 30 along the axial direction by a passage 33. The passage 33 defining the space 35a and the first passage 32' are formed so as to interfere with each other, and at the interference area is formed a throttle portion 323. That is, the diameter of the first passage 32' is formed so that the cross-sectional area thereof is gradually reduced toward the direction of the valve chamber 35, and a throttle portion 323 is formed to the area of the first passage 32' interfering with the passage 33 defining the valve chamber 35'. The throttle portion 323 is formed to have a cross-sectional area corresponding to a diameter of approximately 3 mm. By such structure, the bubbles mixed inside the liquid-phase refrigerant is fined, and refrigerant passage noise is reduced. <IMAGE></p> |
