| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable orifice device capable of surely avoiding a situation in which a valve seat corresponding portion and the like of a throttle passage deforms, capable of expanding a usable temperature range and capable of acquiring desired performance even under an environment where temperature drop is violent. ! SOLUTION: On a peripheral side part of one end side of an orifice case 10, a transverse hole 30 is opened, and a rod-like valve body 20 is fitted and inserted in the orifice case 10. According to a difference in an expansion and contraction amount between the orifice case 10 and the valve body 20 according to temperature change of a refrigerant, a separation distance ΔL between one end 30a of the transverse hole 30 and one end 21a of a contact outer peripheral surface part 21 of the valve body 20 changes; thereby, an effective opening area (area of an arch-shaped opening portion 32) S of the transverse hole 30 changes, and a flow rate of the refrigerant passing in the o |
