| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric control valve for a low noise air conditioner capable of making flow sound of refrigerant low and preventing a restriction part from being blocked by foreign matter and having no welded part in a section requiring airtightness. SOLUTION: This electric control valve is constituted in such a way that a magnet 2 of a stepping motor 3, a valve seat 9a, and a valve element 4 are stored in a case body 10, refrigerant flows in the case body 10, a cap 11 integrated with a magnet holder 2c holding the magnet 2 and rotating together with the magnet 2 covers a predetermined section of the valve element 4, a common spring 5 composed of a spiral fixing spring 6 and a movable spring 7 is coaxially arranged, the fixing spring 6 is separated from the valve element 4 and the magnet 2, extended parts 6a, 6b, 7a are provided at both ends of the fixing spring 6 and at one end of the movable spring 7, and the movable spring 7 is rotatably fitted into a channel 6c of the fixing spring 6. The movable spring 7 is constituted in such a way that the extended part 7a at its one end is locked in a locking part 11a of a wall part of the cap 11 and moves in the axial direction while rotating on the channel 6c of the fixing spring 6 in accordance with rotation of the magnet, rotation of the cap 11 (magnet) is stopped when one end extended part 7a or the other end part 7b of the movable spring 7 is abutted on either of the extended parts 6a, 6b at both ends of the fixing spring, and travel of the valve element 4 is stopped simultaneously. COPYRIGHT: (C)2007,JPO&INPIT
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