| 摘要 |
PROBLEM TO BE SOLVED: To simplify and miniaturize a valve body drive by lessening driving force necessary for operation of a valve body so that refrigerant pressure at a high pressure side is applied to a back of the valve body as back pressure. SOLUTION: A motor-operated valve comprises the valve body 10, a high pressure fluid lead-in pipe 11a arranged on the valve body, a low pressure fluid lead-out pipe 13a arranged on and communicated with the valve body via a valve chamber 12 from the high pressure fluid lead-in pipe, a valve body driving section 20 arranged on the valve body, a guide bush 15 mounted on the valve body, a rotor 31 rotatably driven by the valve body driving section, an operating bar holder 35 supporting on the guide bush 15 integrated with the rotor in a screwed state, and a valve body 40 capable of opening and shutting by an operating bar 30 retained on the operating bar holder 35 in the valve chamber. High pressure fluid pressure of the high pressure fluid lead-in pipe is operated on the valve body from both sides of an opening and shutting direction. COPYRIGHT: (C)2005,JPO&NCIPI
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