| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric expansion valve capable of shortening time until reaching to a valve opening to be set, even if mode switching is performed between a mode to change the valve opening in a small flow rate control range and a mode to change the valve opening in a large flow rate control range. <P>SOLUTION: A step drive control part 111, when mode switching is performed in three operation modes of a heating mode of a refrigeration cycle in which a refrigerant flow rate flowing in a refrigerant path 51a is a first predetermined flow rate or below, a dehumidification heating mode of a refrigeration cycle in which the refrigerant flow rate exceeds the first predetermined flow rate and is a second predetermined flow rate or below, and a cooling mode of a refrigeration cycle in which the refrigerant flow rate is a maximum flow rate in a flow rate range exceeding the second predetermined flow rate, increases a current value when driving a motor part 55 at constant current than in either of flow rate control time in the refrigerant flow rate range in the heating mode, and flow rate control time within the refrigerant flow rate range in the dehumidification heating mode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
