| 摘要 |
PROBLEM TO BE SOLVED: To provide an expansion valve capable of accurately controlling a refrigerant flow rate in a mounting position in which a power element is upward, and also in other mounting positions.SOLUTION: An expansion valve includes: a valve chamber 22 in which a high-pressure liquid refrigerant is introduced; an orifice 26 for depressurizing the refrigerant; a valve body 10 in which an exit passage 28 for sending toward an evaporator, and a return passage 30 are formed; a power element 70 that has a valve disk 40 for adjusting the refrigerant amount passing the orifice, and an operation fluid room 76 in which an operation fluid expanding/shrinking according to a temperature of the low-pressure refrigerant is sealed, and drives the valve disc; and a temperature sensing part 100 that transmits the temperature of the low pressure refrigerant to the operation fluid chamber of the power element. The temperature sensing part is brought into communication with an outside member 110, the operation fluid chamber and the inside of the outside member, and has an inside member 120 for forming a refrigerant receiving chamber 140 between the inner surface of the outside member. A gas/liquid boundary surface of the operation fluid is positioned in the return channel in a mounting position in which the power element is upward and in other mounting positions. |
