KR-102963801-B1 - Electric valve control device and electric valve device

Abstract

[Project] To provide an electric valve control device and an electric valve device capable of relatively easily detecting that the rotation of a magnet rotor is regulated. [Solution] An electric valve control device controls an electric valve. The electric valve has a first magnetic sensor (91) and a second magnetic sensor (92). The output signals of the first magnetic sensor (91) and the second magnetic sensor (92) are logical signals. When the total number of multiple N poles and multiple S poles of the magnet rotor (31) is n, the natural number is N, and the angle formed by the line (M1) connecting the axis line (L) and the first magnetic sensor (91) and the line (M2) connecting the axis line (L) and the second magnetic sensor (92) is θ, the following equation (1) is satisfied. (1) θ = (360/n) × N + (360/2n) The electric valve control device detects that the rotation of the magnet rotor (31) is regulated based on the output signal and the output signal expectation information.

Inventors

• 오기와라 카이
• 나루카와 분타
• 하기모토 히로시
• 요시다 타츠야

Assignees

• 가부시기가이샤 후지고오키

Dates

Publication Date

20260513

Application Date

20230522

Priority Date

20220608

Claims (4)

1. As an electric valve control device for controlling an electric valve, The above electric valve has a valve body having a valve port, a valve body facing the valve port, a can attached to the valve body, a stepping motor for moving the valve body, and a first magnetic sensor and a second magnetic sensor disposed on the outside of the can. The stepping motor has a cylindrical magnet rotor disposed on the inside of the can and a stator disposed on the outside of the can, On the outer surface of the above magnet rotor, a plurality of N poles and a plurality of S poles are alternately arranged at equal intervals in the circumferential direction, and Let n be the total number of the plurality of N poles and the plurality of S poles, let N be the natural number, and let θ be the angle formed by the line connecting the axis of the magnet rotor and the first magnetic sensor when viewed from the axial direction of the magnet rotor and the line connecting the axis and the second magnetic sensor, then the following equation (1) is satisfied, and (1) θ=(360/n)×N+(360/2n) The output signals of the first magnetic sensor and the second magnetic sensor are different signals, and An electric valve control device characterized by detecting that the rotation of the magnet rotor is regulated based on the output signals of the first magnetic sensor and the second magnetic sensor, and output signal expectation information which is the expected value of the output signal when the magnet rotor is rotating.
2. In paragraph 1, An electric valve control device characterized by detecting the rotational direction of the magnet rotor based on the timing at which the output signal of the first magnetic sensor changes from a first value to a second value and the timing at which the output signal of the second magnetic sensor changes from a first value to a second value.
3. An electric valve device characterized by having the above-mentioned electric valve and the electric valve control device described in claim 1 or 2.
4. delete

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 and an electric valve control device. Patent Document 1 discloses an example of a conventional electric valve. The electric valve is assembled, for example, into an air conditioning system. The electric valve has a case, a rotor, a stator, and a Hall IC. The rotor is positioned inside the case. The rotor has a driving magnetic drum and a detection magnetic drum. The stator is positioned outside the case. The rotor and the stator constitute a stepping motor. The Hall IC is positioned outside the case. The output signal of the Hall IC is a signal (two-value signal) that responds to the magnetic field generated by the detection magnetic drum. 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 an electric valve device. FIG. 3 is a cross-sectional view of a stator unit. FIG. 4 is a perspective view of a sensor substrate and a substrate support member. FIG. 5 is another perspective view of the sensor substrate and the substrate support member. FIG. 6 is a diagram illustrating the arrangement of the first magnetic sensor and the second magnetic sensor. FIG. 7 is a diagram schematically illustrating the positional relationship between the poles of the stator and the first magnetic sensor and the second magnetic sensor. FIG. 8 is a perspective view of a control board. FIG. 9 is a diagram illustrating a microcomputer, a stepping motor, a first magnetic sensor, and a second magnetic sensor. FIG. 10 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[1]) is input). FIG. 11 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[2]) is input). FIG. 12 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[3]) is input). FIG. 13 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[4]) is input). FIG. 14 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[5]) is input). FIG. 15 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[6]) is input). FIG. 16 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[7]) is input). FIG. 17 is a diagram schematically illustrating the positional relationship between the magnet rotor and the stator (when a pulse (P[8]) is input). FIG. 18 is a diagram illustrating an example of output signal expectation information of a first magnetic sensor and a second magnetic sensor. FIG. 19 is a drawing illustrating output signal expectation information of a first magnetic sensor and a second magnetic sensor, and an example of the output signals of the first magnetic sensor and the second magnetic sensor. FIG. 20 is a diagram illustrating the movement of a magnet rotor in a state where the rotation of the magnet rotor in the direction of the closing valve is restricted. FIG. 21 is a diagram illustrating the movement of a magnet rotor in a state where the rotation of the magnet rotor in the direction of the closing valve is restricted. (Continued from FIG. 20). FIG. 22 is a flowchart illustrating an example of processing of an electric valve control device. Hereinafter, an electric valve device according to one embodiment of the present invention will be described with reference to each drawing. 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 an electric valve device having an electric valve and an electric valve control device. FIG. 3 is a cross-sectional view of a stator unit of an electric valve. FIG. 4 and FIG. 5 are perspective views of a sensor substrate and a substrate support member of an electric valve. FIG. 6 is a diagram illustrating the arrangement of a first magnetic sensor and a second magnetic sensor of an electric valve. FIG. 6 is a top view of a can, a magnet rotor, a stator, a sensor substrate, a first magnetic sensor, and a second magnetic sensor. In FIG. 6, the can and the magnet rotor are shown as a cross-section cut along a plane including the upper surface of the stator, and the sensor substrate, the first magnetic sensor, and the second magnetic sensor are shown by dashed lines. In FIG. 6, the N pole of the magnet rotor is schematically shown as a diagonal line area, and the S pole is schematically shown as a dot area. FIG. 7 is a schematic diagram illustrating