| 摘要 |
PROBLEM TO BE SOLVED: To reduce refrigerant passing noise at start of an expansion valve and easily obtain an intended flow rate.SOLUTION: A valve body 10 of an expansion valve 1 includes: an inlet port 14 for introducing a high-pressure refrigerant to a valve chamber 20; an orifice 50; a refrigerant outlet passage 52 leading toward an evaporator; and a return passage 60 returning from the evaporator to a compressor. A power element 70 operates a valve member 30 via an operation rod 82 in response to pressure and temperature of a refrigerant in the return passage 60. A support member 100 is disposed in a valve chamber 20 to cover a coil spring 42 and support the valve member 30. When the valve is closed, a shoulder portion 130 of the support member 100 overlaps with the inlet port 14 to narrow an opening area. |
