Abstract: An electric valve control device is configured to (i) start inputting pulse to a stepping motor to rotate a rotor in a first direction, (ii) obtain a rotation angle of the rotor based on a rotation angle signal and a position of the rotor based on a magnetic-flux-density signal each time pulse is input to the stepping motor, and (iii) stop inputting pulse when a change in the rotation angle of the rotor matches a change pattern information and a position of the rotor is a proximity position or a position nearer a reference position than is the proximity position. The change pattern information includes a change in the rotation angle indicating rotation in a second direction.

Abstract: An electric valve control device is configured to (i) start inputting pulse to a stepping motor to rotate a rotor in a first direction, (ii) obtain a rotation angle of the rotor based on a rotation angle signal and a position of the rotor based on a magnetic-flux-density signal each time pulse is input to the stepping motor, and (iii) stop inputting pulse when a change in the rotation angle of the rotor matches a change pattern information and a position of the rotor is a proximity position or a position nearer a reference position than is the proximity position. The change pattern information includes a change in the rotation angle indicating rotation in a second direction.

Abstract: An electric valve includes a motor, a power transmission mechanism that converts rotational movement generated by the motor into axial movement of a valve body, a housing that accommodates at least a part of the power transmission mechanism and the motor, an external connector that is provided to the housing and enables power supply to the motor and communication with a control device connected via a network, and a control substrate that is provided in the housing, processes the communication and controls the motor, and has a connection position connected to an external connector-side terminal and a connection position connected to a motor-side terminal disposed on opposite sides to each other with respect to the axis of the motor.

Abstract: An electric valve control device is configured to (i) start inputting pulse to a stepping motor to rotate a rotor in a first direction, (ii) obtain a rotation angle of the rotor based on a rotation angle signal and a position of the rotor based on a magnetic-flux-density signal each time pulse is input to the stepping motor, and (iii) stop inputting pulse when a change in the rotation angle of the rotor matches a change pattern information and a position of the rotor is a proximity position or a position nearer a reference position than is the proximity position. The change pattern information includes a change in the rotation angle indicating rotation in a second direction.

Abstract: An electrically driven valve includes a valve element configured to move to a direction approaching a valve seat or to a direction separating therefrom, a stepping motor configured to be operated by entering a drive pulse, a driving mechanism configured to drive the valve element by a driving force output from the stepping motor, a nonvolatile storage unit configured to store an amount of hysteresis, and a control unit configured to drive the stepping motor according to an operation instruction information entered from an exterior.

Abstract: An electric valve includes a motor, a power transmission mechanism that converts rotational movement generated by the motor into axial movement of a valve body, a housing that accommodates at least a part of the power transmission mechanism and the motor, an external connector that is provided to the housing and enables power supply to the motor and communication with a control device connected via a network, and a control substrate that is provided in the housing, processes the communication and controls the motor, and has a connection position connected to an external connector-side terminal and a connection position connected to a motor-side terminal disposed on opposite sides to each other with respect to the axis of the motor.

Abstract: The invention provides a control valve which makes the downsizing and the weight reduction possible and a method of manufacturing the same. The control valve is provided with a valve main body in which a valve chamber is formed in its inner portion, a connection member which is firmly fixed to the valve main body, and a can which is firmly fixed to the valve main body. The valve main body and the can include the same metal material. The connection member is made of a resin. The connection member is provided with a fastening portion for connecting piping parts.

Abstract: The invention provides an electrically operated valve which can more accurately detect a position of a valve body. An electrically operated valve is provided with a valve shaft, a valve body, a rotor member which is movable together with the valve shaft in a parallel direction to a first direction, a stator member which applies a turning force to the rotor member, a permanent magnet member which turns together with the rotor member, an angle sensor which detects an angle of rotation of the permanent magnet, and a guide member which guides a relative movement of the rotor member or the valve shaft in relation to the permanent magnet member. A distance between the permanent magnet and the angle sensor is fixed when the permanent magnet member turns.

Abstract: [Object] Provided is a control valve capable of ensuring controllability in both flows without increasing the number of parts. [Solving Means] A plurality of differential pressure valves 50, 60, 70, and 80 are disposed inside a valve body 10 so that a fluid pressure acting on a main valve body 20 disposed inside a main valve chamber 13 becomes the same in a flow of both directions including one direction from a first inlet/outlet 11 to a second inlet/outlet 12 through the main valve chamber 13 and the other direction from the second inlet/outlet 12 to the first inlet/outlet 11 through the main valve chamber 13.

Abstract: The invention provides a control valve which makes the downsizing and the weight reduction possible and a method of manufacturing the same. The control valve is provided with a valve main body in which a valve chamber is formed in its inner portion, a connection member which is firmly fixed to the valve main body, and a can which is firmly fixed to the valve main body. The valve main body and the can include the same metal material. The connection member is made of a resin. The connection member is provided with a fastening portion for connecting piping parts.

Abstract: The invention provides an electrically operated valve which can more accurately detect a position of a valve body. An electrically operated valve is provided with a valve shaft, a valve body, a rotor member which is movable together with the valve shaft in a parallel direction to a first direction, a stator member which applies a turning force to the rotor member, a permanent magnet member which turns together with the rotor member, an angle sensor which detects an angle of rotation of the permanent magnet, and a guide member which guides a relative movement of the rotor member or the valve shaft in relation to the permanent magnet member. A distance between the permanent magnet and the angle sensor is fixed when the permanent magnet member turns.

Abstract: [Object] Provided is a control valve capable of ensuring controllability in both flows without increasing the number of parts. [Solving Means] A plurality of differential pressure valves 50, 60, 70, and 80 are disposed inside a valve body 10 so that a fluid pressure acting on a main valve body 20 disposed inside a main valve chamber 13 becomes the same in a flow of both directions including one direction from a first inlet/outlet 11 to a second inlet/outlet 12 through the main valve chamber 13 and the other direction from the second inlet/outlet 12 to the first inlet/outlet 11 through the main valve chamber 13.

Abstract: The invention provides an electrically operated valve which can control a flow rate precisely at a small flow rate distributing time and can circulate a fluid so as to prevent a pressure loss as much as possible at a large flow rate distributing time without an increase of a working and assembling cost. A movable valve seat body forming a main valve port for forming a small flow rate flow path extending from a first inlet and outlet to a second inlet and outlet is arranged between a valve chamber and a lower chamber. The movable valve seat body is structured such that its lower portion is slidably fitted and inserted to the lower chamber, and such as to serve as a float type check valve body for opening and blocking a large flow rate flow path extending from the second inlet and outlet to the first inlet and outlet.

Abstract: The invention provides an electrically operated valve which can control a flow rate precisely at a small flow rate distributing time and can circulate a fluid so as to prevent a pressure loss as much as possible at a large flow rate distributing time without an increase of a working and assembling cost. A movable valve seat body forming a main valve port for forming a small flow rate flow path extending from a first inlet and outlet to a second inlet and outlet is arranged between a valve chamber and a lower chamber. The movable valve seat body is structured such that its lower portion is slidably fitted and inserted to the lower chamber, and such as to serve as a float type check valve body for opening and blocking a large flow rate flow path extending from the second inlet and outlet to the first inlet and outlet.