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AssigneeFujikoki Corporation
InventorsHiroshi Hagimoto, Yusuke Ishizuka
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An electric valve control device inputs pulses to a stepping motor to rotate a rotor in a second direction; inputs pulses to the stepping motor to rotate the rotor in a first direction when the electric valve is in a second-direction-rotation restricted state; obtains the number of pulses (an input number (Xi)) input to the stepping motor from the second-direction-rotation restricted state to a first-direction-rotation restricted state when the electric valve is in the first-direction-rotation restricted state while the rotor rotates in the first direction; determines that the rotor can rotate normally when the input number (Xi) is greater than or equal to a design number (Xd) and is smaller than or equal to an upper limit number (Xu); and determines that the rotor cannot rotate normally when the input number (Xi) is smaller than the design number (Xd) or is greater than the upper limit number (Xu).
An electric valve control device for controlling an electric valve including a valve body that has a valve port, a stepping motor that includes a rotor, a valve member that moves toward the valve port when the rotor rotates in a first direction and moves away from the valve port when the rotor rotates in a second direction, a first stopper mechanism that restricts rotation of the rotor in the first direction when the rotor is at a reference position, and a second stopper mechanism that restricts rotation of the rotor in the second direction when the rotor is at a full-open position, a state where the rotation of the rotor in the first direction is restricted being a first-direction-rotation restricted state, a state where the rotation of the rotor in the second direction is restricted being a second-direction-rotation restricted state, a number of pulses in design input to the stepping motor when the rotor is rotated from the full-open position to the reference position being a design number,
An electric valve control device for controlling an electric valve including a valve body that has a valve port, a stepping motor that includes a rotor, a valve member that moves toward the valve port when the rotor rotates in a first direction and moves away from the valve port when the rotor rotates in a second direction, a first stopper mechanism that restricts rotation of the rotor in the first direction when the rotor is at a reference position, and a second stopper mechanism that restricts rotation of the rotor in the second direction when the rotor is at a full-open position, a state where the rotation of the rotor in the first direction is restricted being a first-direction-rotation restricted state, a state where the rotation of the rotor in the second direction is restricted being a second-direction-rotation restricted state, a number of pulses in design input to the stepping motor when the rotor is rotated from the reference position to the full-open position being a design number,
A method for controlling an electric valve including a valve body that has a valve port, a stepping motor that includes a rotor, a valve member that moves toward the valve port when the rotor rotates in a first direction and moves away from the valve port when the rotor rotates in a second direction, a first stopper mechanism that restricts rotation of the rotor in the first direction when the rotor is at a reference position, and a second stopper mechanism that restricts rotation of the rotor in the second direction when the rotor is at a full-open position, a state where the rotation of the rotor in the first direction is restricted being a first-direction-rotation restricted state, a state where the rotation of the rotor in the second direction is restricted being a second-direction-rotation restricted state, a number of pulses in design input to the stepping motor when the rotor is rotated from the full-open position to the reference position being a design number,
A method for controlling an electric valve including a valve body that has a valve port, a stepping motor that includes a rotor, a valve member that moves toward the valve port when the rotor rotates in a first direction and moves away from the valve port when the rotor rotates in a second direction, a first stopper mechanism that restricts rotation of the rotor in the first direction when the rotor is at a reference position, and a second stopper mechanism that restricts rotation of the rotor in the second direction when the rotor is at a full-open position, a state where the rotation of the rotor in the first direction is restricted being a first-direction-rotation restricted state, a state where the rotation of the rotor in the second direction is restricted being a second-direction-rotation restricted state, a number of pulses in design input to the stepping motor when the rotor is rotated from the reference position to the full-open position being a design number,
Dependencies are inferred from the claim text.