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KR-102963780-B1 - Electric valve control device and electric valve device

KR102963780B1KR 102963780 B1KR102963780 B1KR 102963780B1KR-102963780-B1

Abstract

[assignment] An electric valve control device and an electric valve device capable of suppressing noise by reducing the time required for the initialization operation of the electric valve are provided. [Solution] The electric valve control device (90) (1) starts inputting a pulse (P) to the stepping motor (66) to rotate the rotor (41) in a first direction, (2) whenever a pulse (P) is input to the stepping motor (66), acquires the rotation angle of the rotor (41) based on the rotation angle signal (Sa) and also acquires the position of the rotor (41) based on the magnetic flux density signal (Sm), and (3) stops inputting the pulse (P) to the stepping motor (66) when the change in the rotation angle of the rotor (41) matches the change pattern information (J) and the position of the rotor (41) is a position closer to the reference position (Rx) than the proximity position (Rk). And, the change pattern information (J) includes a change in the rotation angle indicating rotation in a second direction.

Inventors

  • 이시즈카 유스케
  • 나루카와 분타
  • 오기와라 카이

Assignees

  • 가부시기가이샤 후지고오키

Dates

Publication Date
20260512
Application Date
20221228
Priority Date
20220204

Claims (15)

  1. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor, The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Whenever a pulse is input to the stepping motor, the rotation angle of the rotor is obtained based on the signal of the rotation angle sensor, and (3) When the change in the rotation angle matches a preset change pattern, the input of pulses to the stepping motor is stopped, and An electric valve control device characterized in that the above change pattern includes a change in the rotation angle that uniquely indicates rotation in the second direction.
  2. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor, and a position sensor that outputs a signal corresponding to the position of the rotor. The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Whenever a pulse is input to the stepping motor, the rotation angle of the rotor is obtained based on the signal of the rotation angle sensor, and the position of the rotor is obtained based on the signal of the position sensor. (3) When the change in the rotation angle matches a preset change pattern and the position of the rotor is a preset proximity position or a position closer to the reference position than the proximity position, the input of pulses to the stepping motor is stopped, and An electric valve control device characterized in that the above change pattern includes a change in the rotation angle indicating rotation in the above second direction.
  3. In paragraph 1 or 2, An electric valve control device characterized in that the above change pattern further includes a change in the rotation angle that uniquely indicates rotation in the first direction.
  4. In paragraph 1 or 2, An electric valve control device characterized in that the above change pattern includes a change in the rotation angle corresponding to a plurality of pulses that are repeatedly input to the stepping motor in a predetermined sequence.
  5. In paragraph 4, When the number of the above plurality of pulses is set as the "number of pulses to be compared," An electric valve control device characterized by the above-described electric valve control device acquiring a change in rotation angle for a recent pulse input of the above-described comparison target pulse number, and stopping the pulse input to the stepping motor when the combination of the pulse of the above-described comparison target pulse number and the change in rotation angle corresponding to each pulse matches the combination of the pulse of the change pattern and the change in rotation angle corresponding to each pulse.
  6. In paragraph 4, An electric valve control device characterized by, in an operation of setting the change pattern, when the electric valve control device inputs a pulse to the stepping motor to rotate the rotor in the first direction and detects a change in the rotation angle indicating rotation in the second direction, acquiring the rotation angle corresponding to the plurality of pulses and setting the change pattern based on the rotation angle.
  7. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor, The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Whenever a pulse is input to the stepping motor, the rotation angle of the rotor is obtained based on the signal of the rotation angle sensor, and (3-1) When a change in the rotation angle that uniquely indicates rotation in the second direction is detected, the input of pulses to the stepping motor is stopped, or, (3-2) An electric valve control device characterized by stopping the input of pulses to the stepping motor when, after detecting a change in the rotation angle that uniquely indicates rotation in the second direction, a change in the rotation angle that uniquely indicates rotation in the first direction is detected.
  8. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor, and a position sensor that outputs a signal corresponding to the position of the rotor. The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Whenever a pulse is input to the stepping motor, the rotation angle of the rotor is obtained based on the signal of the rotation angle sensor, and the position of the rotor is obtained based on the signal of the position sensor. (3-1) Detect a change in the rotation angle indicating rotation in the second direction, and also stop the input of pulses to the stepping motor when the position of the rotor is a preset proximity position or a position closer to the reference position than the proximity position, or, (3-2) After detecting a change in the rotation angle indicating rotation in the second direction, detect a change in the rotation angle indicating rotation in the first direction, and also stop the input of pulses to the stepping motor when the position of the rotor is the proximity position or a position closer to the reference position than the proximity position.
  9. In paragraphs 1, 2, 7, or 8, The above electric valve has a permanent magnet attached to the rotor, An electric valve control device characterized by the above-mentioned rotation angle sensor outputting a signal corresponding to the rotation angle of the magnetic field generated by the above-mentioned permanent magnet.
  10. In paragraph 2 or 8, The above electric valve has a permanent magnet attached to the rotor, When the rotor rotates in the first direction, it approaches the valve opening, and when it rotates in the second direction, it moves away from the valve opening. The above rotation angle sensor outputs a signal corresponding to the rotation angle of the magnetic field generated by the above permanent magnet, and An electric valve control device characterized in that the above position sensor outputs a signal corresponding to the strength of the above magnetic field.
  11. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor (hereinafter referred to as the "rotation angle signal"), The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Acquire the above rotation angle signal, (3) When the change in the rotation angle signal matches a preset change pattern, the input of pulses to the stepping motor is stopped, and An electric valve control device characterized in that the above change pattern includes a change in the rotation angle signal that uniquely indicates rotation in the second direction.
  12. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor (hereinafter referred to as the "rotation angle signal") and a position sensor that outputs a signal corresponding to the position of the rotor (hereinafter referred to as the "position signal"). The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Acquire the above rotation angle signal, and also acquire the above position signal, (3) When the change in the rotation angle signal matches a preset change pattern and the position signal is a value corresponding to a preset proximity position or a position closer to the reference position than the proximity position, the input of pulses to the stepping motor is stopped, and An electric valve control device characterized in that the above change pattern includes a change in the rotation angle signal indicating rotation in the second direction.
  13. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor (hereinafter referred to as the "rotation angle signal"), The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Acquire the above rotation angle signal, (3-1) When a change in the rotation angle signal that uniquely indicates rotation in the second direction is detected, the input of pulses to the stepping motor is stopped, or, (3-2) An electric valve control device characterized by stopping the input of pulses to the stepping motor when, after detecting a change in the rotation angle signal that uniquely indicates rotation in the second direction, a change in the rotation angle signal that uniquely indicates rotation in the first direction is detected.
  14. An electric valve control device for controlling an electric valve having a valve body having a valve port, a stepping motor having a rotor, a valve body that approaches the valve port when the rotor is rotated in a first direction and moves away from the valve port when the rotor is rotated in a second direction, and a stopper mechanism that regulates the rotation of the rotor in the first direction when the rotor is in a reference position, The above electric valve control device has a rotation angle sensor that outputs a signal corresponding to the rotation angle of the rotor (hereinafter referred to as the "rotation angle signal") and a position sensor that outputs a signal corresponding to the position of the rotor (hereinafter referred to as the "position signal"). The above electric valve control device (1) Start inputting pulses to the stepping motor to rotate the rotor in the first direction, and (2) Acquire the above rotation angle signal, and also acquire the above position signal, (3-1) Detect a change in the rotation angle signal indicating rotation in the second direction, and also stop the input of pulses to the stepping motor when the position signal is a value corresponding to a preset proximity position or a position closer to the reference position than the proximity position, or, (3-2) After detecting a change in the rotation angle signal indicating rotation in the second direction, detect a change in the rotation angle signal indicating rotation in the first direction, and also stop the input of pulses to the stepping motor when the position signal is a value corresponding to the proximity position or a position closer to the reference position than the proximity position.
  15. An electric valve device characterized by having the above-mentioned electric valve and the electric valve control device described in claims 1, 2, 7, 8, 11, 12, 13, or 14.

Description

Electric valve control device and electric valve device The present invention relates to an electric valve control device and an electric valve device having an electric valve control device. Patent Document 1 discloses an example of a conventional electric valve. Such an electric valve is assembled into a refrigeration cycle of an air conditioner. The electric valve has a valve body, a valve body, and a stepping motor for moving the valve body. The stepping motor has a rotor and a stator. When a pulse is input to the stepping motor, the rotor rotates. The electric valve has a moving mechanism that moves the valve body in response to the rotation of the rotor. The rotor rotates between a reference position and an open position. When the rotor rotates in a direction toward the reference position (a first direction), the valve body approaches the valve opening. When the rotor is in the reference position, a movable stopper attached to the rotor contacts a fixed stopper attached to the valve body, thereby restricting the rotation of the rotor in the first direction. When the rotor is in the fully open position, the valve body is furthest away from the valve opening of the valve body. The electric valve is controlled by an electric valve control device. In the initialization operation, the electric valve control device inputs pulses to the stepping motor to rotate the rotor in a first direction and position the rotor in a reference position. The number of pulses input to the stepping motor is a sufficient number for the movable stopper to come into contact with the fixed stopper (hereinafter referred to as the "initialization number"). The initialization number is set based on the number of pulses input to the stepping motor when rotating the rotor from the extended position to the reference position. When the rotor rotates in the first direction and the movable stopper comes into contact with the fixed stopper, the rotor is positioned in the reference position. FIG. 1 is a block diagram of an air conditioning system having an electric valve device according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of the electric valve device of FIG. 1. FIG. 3 is a cross-sectional view of a valve body assembly having the electric valve device of FIG. 2. FIG. 4 is a cross-sectional view of a stator unit having the electric valve device of FIG. 2. FIG. 5 is a drawing illustrating the rotor and stator of the electric valve device of FIG. 2. FIG. 6 is a diagram illustrating the computer, motor driver, magnetic sensor, permanent magnet, and stepping motor of the electric valve device of FIG. 2. FIG. 7 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[1]) is input). FIG. 8 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[2]) is input). FIG. 9 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[3]) is input). FIG. 10 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[4]) is input). FIG. 11 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[5]) is input). FIG. 12 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[6]) is input). FIG. 13 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[7]) is input). FIG. 14 is a diagram schematically illustrating the positional relationship between the magnetic poles of the rotor and the poles of the stator (when a pulse (P[8]) is input). FIG. 15 is a diagram illustrating the movement of a rotor when a pulse that rotates the rotor in the first direction is input to a stepping motor while the rotation of the rotor in the first direction is restricted. FIG. 16 is a diagram illustrating the movement of a rotor when a pulse that rotates the rotor in the first direction is input to a stepping motor while the rotation of the rotor in the first direction is restricted (continuation of FIG. 15). FIG. 17 is a graph illustrating an example of a change in the rotation angle of a rotor. FIG. 18 is a drawing illustrating an example of change pattern information. FIG. 19 is a graph illustrating an example of a signal output by a magnetic sensor. FIG. 20 is a flowchart illustrating an example of an initialization operation performed by a computer having the electric valve device of FIG. 2. FIG. 21 is a flowchart illustrating an example of a change pattern setting operation perf